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Old 02-11-2007, 07:51   #1
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WANTED: 26"D 20P LHR 3 Blade for 1.5 inch Shaft

Looking for something to have as a spare prop. shoot me a message if you have something in decent condition.

thanks!
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Old 02-11-2007, 15:12   #2
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My, what a big pitch you want...

I'm curious as I seem to have a 20"D X 20"P prop and I am grossly over pitched. I can only get 1600 rpm (40 hp) at 7kts!

I would be about 15tonne, 44'LOA and 75hp at 2500 rpm, which is similar to you.

You are going to use a 26"D X 20"P for 85hp?

I am planning to get the prop repitched down to 14-16".
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Old 02-11-2007, 15:40   #3
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i replaced a 26/20 feathering prop, with my spare fixed prop 26/20 so i just want a backup, always nice to have a spare. I'm 45.5 LOA at 18 tons with an 85hp.
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Old 02-11-2007, 19:59   #4
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Full speed ahead...

What engine speed (rpm) do you get at full throttle?
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Old 03-11-2007, 14:05   #5
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Sounds to me like there is a different gearbox ratio between these two boats
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Old 03-11-2007, 15:37   #6
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Engine is rated for 2600 i cruise around 1600 to 1800
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Old 03-11-2007, 21:05   #7
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Gear box 2.5:1 to 3:1...

I really wanted to check the accuracy of my calculations for repitching my propeller with some real world data.

If your gearbox is in the range of 2.5:1 to 3:1 then my calculations are on track.
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